Question 1146540
<pre>
There are 10+12+13+7+8 = 50 balls
10 white and 12 blue

{{{P(

matrix(1,3,


matrix(1,3,


(matrix(4,1,FIRST,BALL,IS,WHITE)),
AND,
(matrix(4,1,SECOND,BALL,IS,BLUE))
)^"",OR,

matrix(1,3,


(matrix(4,1,FIRST,BALL,IS,WHITE)),
AND,
(matrix(4,1,SECOND,BALL,IS,BLUE))
))


)}}}

"AND" tells us to multiply.
"OR" tells us to add, so

{{{(10/50)(12/50)+(12/50)(10/50)}}}

{{{0.0960}}}

Edwin</pre>